The Roborock F25 Ultra is currently available for sale on Amazon Prime at a price under 500 euros, which represents a reduction of about 21 percent compared to its usual retail price. This model is currently among the top products in recent comparisons of robot vacuum cleaners. The F25 series from Roborock has received a new version with the prefix Ultra. To justify this name, this model is equipped with steam functions that allow it to clean the dirtiest floors. The Roborock F25 Ultra is maneuverable and agile despite its size and performs its cleaning task well. It cleans the floor satisfactorily even without using steam. The steam function is supposed to improve the results of automatic cleaning. However, this process is quite noisy, and the filter that retains solid particles from the wastewater tank is not fine enough. The price reduction mentioned is calculated by comparing the lowest price of the day with the average of the lowest prices offered by all sellers for the product over the past month, applying safety rules to exclude prices from stores with unclear VAT policies. As an alternative, the Roborock F25 Steam is also available. It is very difficult to find any flaws with the Roborock F25 Steam. True, the water tank on top is not the best idea, and a more precise remaining battery indicator would have been appreciated instead of the LEDs used here. However, these minor issues pale in comparison to the excellent cleaning performance of this model, which is easy to move thanks to its motorized wheels and very simple to maintain.